| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| WListableBase |
|
| 1.0;1 |
| 1 | /* | |
| 2 | * Copyright 2001-2004 The Apache Software Foundation | |
| 3 | * | |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 5 | * you may not use this file except in compliance with the License. | |
| 6 | * You may obtain a copy of the License at | |
| 7 | * | |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 9 | * | |
| 10 | * Unless required by applicable law or agreed to in writing, software | |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 13 | * See the License for the specific language governing permissions and | |
| 14 | * limitations under the License. | |
| 15 | */ | |
| 16 | package org.apache.commons.cache.adt; | |
| 17 | ||
| 18 | /** | |
| 19 | * An base implementation of {@link Listable}, supporting | |
| 20 | * doubly-linked lists. | |
| 21 | * | |
| 22 | * @version $Id: WListableBase.java 155435 2005-02-26 13:17:27Z dirkv $ | |
| 23 | * @author Rodney Waldhoff | |
| 24 | */ | |
| 25 | public class WListableBase extends ListableBase implements Listable, Cloneable { | |
| 26 | ||
| 27 | /** My preceeding sibling. */ | |
| 28 | 0 | protected transient Listable _prev = null; |
| 29 | ||
| 30 | /** | |
| 31 | * No arg constructor. | |
| 32 | * Equivalent to {@link #WListableBase(Listable,Listable) <tt>WListableBase(null,null)</tt>}. | |
| 33 | */ | |
| 34 | 0 | public WListableBase() { |
| 35 | 0 | } |
| 36 | ||
| 37 | /** | |
| 38 | * Constructor. | |
| 39 | * @param prev the prev element in the list. | |
| 40 | * @param next the next element in the list. | |
| 41 | */ | |
| 42 | public WListableBase(Listable prev, Listable next) { | |
| 43 | 0 | super(next); |
| 44 | 0 | _prev = prev; |
| 45 | 0 | } |
| 46 | ||
| 47 | public Listable getPrev() { | |
| 48 | 0 | return _prev; |
| 49 | } | |
| 50 | ||
| 51 | public boolean hasPrev() { | |
| 52 | 0 | return (null != _prev); |
| 53 | } | |
| 54 | ||
| 55 | public void setPrev(Listable prev) { | |
| 56 | 0 | _prev = prev; |
| 57 | 0 | } |
| 58 | } |